CN114727344A - Cell residence method and equipment - Google Patents

Cell residence method and equipment Download PDF

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Publication number
CN114727344A
CN114727344A CN202210253734.5A CN202210253734A CN114727344A CN 114727344 A CN114727344 A CN 114727344A CN 202210253734 A CN202210253734 A CN 202210253734A CN 114727344 A CN114727344 A CN 114727344A
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China
Prior art keywords
cell
terminal device
reference value
service quality
quality reference
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CN202210253734.5A
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Chinese (zh)
Inventor
郑德来
杨建华
郭翱
程永旺
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CN202210253734.5A priority Critical patent/CN114727344A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/0085—Hand-off measurements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00835—Determination of neighbour cell lists
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00837—Determination of triggering parameters for hand-off
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0058—Transmission of hand-off measurement information, e.g. measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/302—Reselection being triggered by specific parameters by measured or perceived connection quality data due to low signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/34—Reselection control
    • H04W36/36—Reselection control by user or terminal equipment
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

A cell residence method and equipment are used for solving the problem that power consumption is wasted because cell measurement is still carried out on terminal equipment under the scene that cell switching is probably not needed, so that the performance of the terminal equipment is influenced. In the method, the terminal equipment selects a cell with the highest reference value of service quality from cells searched by the terminal equipment as a first cell resided currently; when the service quality reference value of the first cell is smaller than the first threshold value, the terminal device reports the a1 event or determines not to report the a2 event, so that the terminal device does not perform cell switching, and power consumption caused by the need of performing cell switching by the terminal device can be avoided.

Description

Cell residence method and equipment
Technical Field
The present application relates to the field of communications technologies, and in particular, to a cell camping method and device.
Background
At present, in a long term evolution (LET) network, when the signal quality of a serving cell in which a terminal device resides is poor, a terminal device requests a network device to allocate a neighbor cell to be measured and a measurement time slot required for measuring the neighbor cell to the terminal device, after the network device allocates the measurement time slot and the neighbor cell to the terminal device, the network device informs the terminal device of the allocated measurement time slot and cell information of the neighbor cell, and then the terminal device performs cell measurement on the neighbor cell at the measurement time slot allocated by the network device and feeds back a measurement result to the network device, and the network device selects a target cell to which the terminal device can be switched according to the measurement result, so that the terminal device performs cell switching.
In some scenarios, the network device may allocate a poor service quality reference value of the neighboring cell to the terminal device, even the poor service quality reference value is inferior to that of the cell (referred to as a serving cell for short) in which the terminal device currently resides, but based on the existing mechanism, even if the service quality reference value of the currently residing serving cell is better than that of the neighboring cell, the terminal device is not actually required to perform cell handover, but as long as the service quality reference value of the cell in which the terminal device resides is lower than a certain threshold value, the terminal device is triggered to request the neighboring cell and the measurement time slot from the network device, and then perform cell measurement; in this case, the cell measurement may affect the performance of the terminal device, resulting in wasted power consumption.
Disclosure of Invention
The application provides a cell residence method and device, which are used for solving the problem that in the prior art, cell measurement is still carried out on terminal equipment under the scene that cell switching is probably not needed, so that the performance of the terminal equipment is influenced, and the power consumption is wasted.
In a first aspect, an embodiment of the present application provides a terminal device, where the terminal device includes a processor and a memory;
the memory stores code instructions;
the processor is used for calling the code instructions stored by the memory and executing:
selecting a cell with the highest reference value of service quality from the searched cells as a first cell which is resided currently;
and when the service quality reference value of the first cell is smaller than a first threshold value, reporting the A1 event or determining not to report the A2 event.
In this embodiment of the present application, since the first cell is already a cell with a highest reference value of service quality in the searched cells, when the reference value of service quality of the first cell is smaller than a first threshold value, an a1 event may be reported or an a2 event is determined not to be reported, and cell handover may not be performed, thereby avoiding power consumption caused by cell handover required by the terminal device.
In one possible design, the first threshold may be configured by the network device, or may be a fixed value, such as-90 dbm, -105 dbm.
In one possible design, the code instructions further include, before reporting the a1 event or determining not to report the a2 event, determining that a preset condition is satisfied, where the preset condition is used to instruct the first cell of the terminal device to be a cell with a highest reference value of service quality among cells searched by the terminal device. And further confirming that the first cell is the cell with the highest service quality reference value in the cells searched by the terminal equipment through a preset condition, so that the terminal equipment can be ensured to reside in a better cell, the service continuity of the terminal equipment can be ensured, and the user experience is provided.
In one possible design, the preset condition is at least one of the following:
the terminal equipment is positioned in a first area, the moving distance of the terminal equipment is not more than a first distance, the moving range of the terminal equipment is in the first range, and the interval between the measuring time of the locally stored service quality reference value of the adjacent cell and the current time is not more than a first duration; the method can be applied to different states of the terminal equipment under various preset conditions, can be applied to different scenes, and can effectively expand the application range.
In one possible design, the code instructions further include: stopping cell measurements after determining that the quality of service reference value of the first cell is less than a first threshold value; the terminal device stops cell measurement to help reduce power consumption.
In one possible design, a first measurement report may be sent to the network device in reporting an a1 event, where the first measurement report is used to inform the network device that a quality of service reference value of the first cell is greater than the first threshold value; the event a1 may be reported by sending a first measurement report, so as to ensure that the network device can timely know the state of the qos reference value of the first cell.
In a possible design, when sending the first measurement report to the network device, the qos reference value of the first cell may be modified first, so that the modified qos reference value of the first cell is greater than the first threshold value; then, sending a first measurement report carrying the modified QoS reference value of the first cell to the network equipment; the reporting of the a1 event can be triggered by modifying the qos reference value of the first cell, and the modified qos reference value of the first cell carried in the first measurement report can also make the network device determine that the qos reference value of the first cell is greater than the first threshold more definitely.
In one possible design, the determining not to report the a2 event may be determining not to send a second measurement report to the network device, where the second measurement report is used to notify the network device that a quality of service reference value of the first cell is smaller than the first threshold value; by not sending the second measurement report, the network device may not allocate a measurement timeslot, and thus, the terminal device may be prevented from performing cell measurement, and power consumption may be reduced.
In one possible design, the code instructions further include: after determining that the service quality reference value of the first cell is smaller than a first threshold value, sending a first message to the network device, where the first message is used to indicate that the terminal device meets the preset condition; by means of sending the first message, the network device can definitely know the state of the terminal device, and then the network device does not allocate a measurement time slot, so that the terminal device can be prevented from performing cell measurement, and power consumption is reduced.
In one possible design, the first message includes location information of the terminal device. The network device can be explicitly informed of the location information of the terminal device for performing the relevant operations.
In a second aspect, an embodiment of the present application provides a cell camping method, including:
the terminal equipment selects a cell with the highest reference value of service quality from the cells searched by the terminal equipment as a first cell resided currently;
and when the service quality reference value of the first cell is smaller than a first threshold value, the terminal equipment reports an A1 event or determines not to report an A2 event.
In a possible design, before the terminal device reports the a1 event or determines not to report the a2 event, the terminal device may determine that a preset condition is satisfied, where the preset condition is used to indicate that the first cell of the terminal device is a cell with a highest reference value of service quality in cells searched by the terminal device.
In one possible design, the preset condition is at least one of the following:
the terminal equipment is located in a first area, the moving distance of the terminal equipment is not more than a first distance, the moving range of the terminal equipment is within a first range, and the interval between the measuring time of the locally stored service quality reference value of the adjacent cell and the current time is not more than a first duration.
In one possible design, the terminal device may stop cell measurement after determining that the quality of service reference value of the first cell is less than a first threshold value.
In one possible design, when reporting the a1 event, the terminal device may send a first measurement report to the network device, where the first measurement report is used to notify the network device that a service quality reference value of the first cell is greater than the first threshold value.
In a possible design, when the terminal device sends the first measurement report to the network device, the terminal device may modify the qos reference value of the first cell first, where the modified qos reference value of the first cell is greater than the first threshold value; and then, sending a first measurement report carrying the modified QoS reference value of the first cell to the network equipment.
In one possible design, when the terminal device determines not to report the a2 event, the terminal device may determine not to send a second measurement report to the network device, where the second measurement report is used to notify the network device that the qos reference value of the first cell is smaller than the first threshold value.
In a possible design, after determining that the qos reference value of the first cell is smaller than the first threshold value, the terminal device may further send a first message to the network device, where the first message is used to indicate that the terminal device meets the preset condition.
In one possible design, the first message includes location information of the terminal device.
In a third aspect, an embodiment of the present application provides a chip, where the chip includes a processor and an interface;
the interface is used for receiving code instructions and transmitting the received code instructions to the processor;
the processor is configured to execute the received code instruction sent by the interface, and execute:
selecting a cell with the highest reference value of service quality from the cells searched by the terminal equipment as a first cell resided currently;
and when the service quality reference value of the first cell is smaller than a first threshold value, reporting the A1 event or determining not to report the A2 event.
In one possible design, the first threshold may be configured by the network device, or may be a fixed value, such as-90 dbm, -105 dbm.
In one possible design, the code instructions further include, further including: determining that a preset condition is satisfied before reporting an A1 event or determining not to report an A2 event, where the preset condition is used to instruct the first cell of the terminal device to be a cell with a highest service quality reference value among cells searched by the terminal device.
In one possible design, the preset condition is at least one of the following:
the terminal equipment is located in a first area, the moving distance of the terminal equipment is not more than a first distance, the moving range of the terminal equipment is within a first range, and the interval between the measuring time of the locally stored service quality reference value of the adjacent cell and the current time is not more than a first duration.
In one possible design, the code instructions further include: stopping cell measurements after determining that the quality of service reference value of the first cell is less than a first threshold value.
In one possible design, a first measurement report may be sent to the network device in reporting the a1 event, where the first measurement report is used to inform the network device that the quality of service reference value of the first cell is greater than the first threshold value.
In a possible design, when sending the first measurement report to the network device, the qos reference value of the first cell may be modified first, so that the modified qos reference value of the first cell is greater than the first threshold value; and then, sending a first measurement report carrying the modified QoS reference value of the first cell to the network equipment.
In one possible design, the determining not to report the a2 event may be determining not to send a second measurement report to the network device, where the second measurement report is used to inform the network device that a quality of service reference value of the first cell is less than the first threshold value.
In one possible design, the code instructions further include: after determining that the service quality reference value of the first cell is smaller than a first threshold value, sending a first message to the network device, where the first message is used to indicate that the terminal device meets the preset condition.
In one possible design, the first message includes location information of the terminal device.
In a fourth aspect, an embodiment of the present application further provides a computer storage medium, where the computer storage medium stores program instructions, and when the program instructions are executed on an electronic device, the computer storage medium may implement the method provided by the first aspect or any design of the first aspect described above.
In addition, the technical effects brought by any one of the possible design manners in the second aspect to the fourth aspect can be referred to the technical effects brought by different design manners in the related apparatus parts, and are not described herein again.
Drawings
Fig. 1 is a schematic diagram of an application scenario provided in an embodiment of the present application;
fig. 2 is a schematic diagram of a method for cell camping according to an embodiment of the present application;
fig. 3 is a schematic diagram of a location relationship between cells according to an embodiment of the present application;
fig. 4A to 4B are a first schematic diagram and a second schematic diagram of a first area in a cell according to an embodiment of the present disclosure;
fig. 4C to 4D are a first schematic diagram and a second schematic diagram of a moving distance of a terminal device according to an embodiment of the present application;
fig. 4E to 4F are a first schematic diagram and a second schematic diagram of a moving range of a terminal device according to an embodiment of the present application;
fig. 5A is a schematic structural diagram of a terminal device according to an embodiment of the present application;
fig. 5B is a schematic diagram of a relationship between τ and an autocorrelation value according to an embodiment of the present disclosure;
fig. 5C is a schematic diagram illustrating a relationship between a gear and a doppler shift according to an embodiment of the present disclosure;
fig. 6 is a flowchart of a method for cell camping according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of a terminal device according to an embodiment of the present application;
fig. 8 is a schematic structural diagram of a chip according to an embodiment of the present application.
Detailed Description
The application provides a cell residence method and device, which are used for solving the problem that in the prior art, cell measurement is still carried out on terminal equipment in a scene that cell switching is probably not needed, so that the performance of the terminal equipment is influenced, and the power consumption is wasted. The method and the device are based on the same conception, and because the principle of solving the problems of the method and the device is similar, the implementation of the device and the method can be mutually referred, and repeated parts are not repeated.
It is to be understood that the terms "first," "second," "third," and the like in the description of the present application are used for descriptive purposes only and not for purposes of indicating or implying relative importance, nor order;
fig. 1 is a schematic view of a scenario applicable to the embodiment of the present application, where the scenario includes a network device and a terminal device.
The terminal device in the present application, which may also be referred to as a User Equipment (UE), may be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; can also be deployed on the water surface (such as a ship and the like); and may also be deployed in the air (e.g., airplanes, balloons, satellites, etc.). The terminal device may be a mobile phone (mobile phone), a tablet computer (pad), a computer with wireless transceiving function, a Virtual Reality (VR) device, an Augmented Reality (AR) device, a wireless device in industrial control (industrial control), a wireless device in unmanned driving (self driving), a wireless device in remote medical treatment (remote medical), a wireless device in smart grid (smart grid), a wireless device in transportation safety (transportation safety), a wireless device in smart city (smart city), a wireless device in smart home (smart home), and the like.
The network device is a device for providing a wireless communication function for the terminal device, and includes but is not limited to: a base station, a next generation node B (gNB) in 5G, an evolved node B (eNB), a Radio Network Controller (RNC), a Node B (NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), a home base station (e.g., home evolved node B, or home node B, HNB), a Base Band Unit (BBU), a transmission point (TRP), a Transmission Point (TP), a mobile switching center, and the like.
Usually, there may be multiple network devices in the vicinity of the terminal device, the terminal device may select a cell as a serving cell according to a service quality reference value (such as signal quality) of a cell in which each network device is located, there may be a difference in the service quality reference values of the cells in which different network devices are located, and the terminal device should reside in a cell with a better service quality reference value. As shown in fig. 1, there are three network devices, which are a network device 1, a network device 2, and a network device 3, respectively, the terminal device resides in a cell 1 where the network device 1 is located, the cell 1 is a serving cell of the terminal device, and the cell 2 where the network device 2 is located and the cell 3 where the network device 3 is located are adjacent to the cell 1 and are adjacent to the cell 1.
In order to ensure that the terminal device can always reside in a cell with a better service quality reference value, the terminal device may send a measurement report to the network device, notify the size of the service quality reference value and the absolute threshold of the current serving cell, and start or close cell measurement, which includes the following specific processes:
a1 event (event a 1): the service quality reference value of the serving cell is greater than or equal to a first threshold value. The terminal device may notify, through the first measurement report, the network device that a service quality reference value of a serving cell of the terminal device is greater than or equal to a first threshold value, that is, report an a1 event to the network device to stop cell measurement, where after receiving the first measurement report, the network device may deactivate a measurement timeslot that is allocated to the terminal device before the network device performs cell measurement.
A2 event (event a 2): the service quality reference value of the serving cell is less than a first threshold value. The terminal device may notify, through the second measurement report, the network device that the qos reference value of the serving cell of the terminal device is smaller than the first threshold value, that is, report the a2 event to the network device, after the network device receives the second measurement report, the network device may allocate a measurement time slot and a neighboring cell for performing cell measurement to the terminal device, and the terminal device obtains the measurement time slot from the network device and may perform cell measurement.
It should be noted that the cell measurement involved in the event is the measurement of a different-frequency cell, a different-system cell or a different-frequency different-system cell, and for a same-frequency same-system cell, the terminal device may perform the cell measurement of the same-frequency same-system cell according to the information of the measurement control cell sent by the network device in advance; and when the terminal equipment carries out cell measurement of the different-frequency cell, the different-system cell or the different-frequency different-system cell, the terminal equipment simultaneously starts cell measurement of the same-frequency same-system cell.
The system includes, but is not limited to, an evolved universal mobile telecommunications system terrestrial radio access (eUTRAN) system, a Frequency Division Duplex (FDD) system, a time division duplex (time division duplex, UTRAN), a UMTS terrestrial radio access network (UMTS) system, a code division duplex (GMS/EDGE), a multiple access network (GSM/EDGE), a system of the same frequency band as the serving cell and the same system, a different frequency cell different from the serving cell and the system of the different frequency band from the serving cell CDMA) system, etc.
Among them, GSM (global system for mobile communications) is a global system for mobile communications, and edge (enhanced data rate for GSM evolution) is an enhanced data rate GSM evolution technology.
Taking the scenario diagram shown in fig. 1 as an example, a manner of determining the serving cell by the terminal device is described, where when the terminal device enters a range of a cell 1 for the first time or needs to re-access a cell (for example, the terminal device is turned on, restarted, or reselected to a network), the terminal device searches for and measures surrounding cells, that is, measures neighboring cells of the cell 1 and the cell 1 (taking neighboring cells of the cell 1 as a cell 2 and a cell 3), determines service quality reference values of the cell 1, the cell 2, and the cell 3, compares the service quality reference values of the cell 1, the cell 2, and the cell 3, selects a cell with the highest service quality reference value among the cell 1, the cell 2, and the cell 3 as the serving cell, and takes the highest service quality reference value of the cell 1 as an example, the terminal device selects the cell 1 as the serving cell, resides in cell 1.
In a possible implementation, the terminal device may also manually select a network, for example, the terminal device may also manually select a cell with the highest reference quality of service in the cells as the serving cell.
If the terminal device finds that the service quality of the currently resident serving cell is poor in measurement and the service quality reference value of the serving cell is lower than the first threshold value (which may also be referred to as an absolute threshold), the terminal device reports an a2 event to the network device to request the network device to allocate the measurement time slot and the neighboring cell, the terminal device performs cell measurement on the neighboring cell on the measurement time slot and then feeds back the measurement result to the network device, and the network device selects the neighboring cell with the better service quality reference value for the network device according to the measurement result and controls the terminal device to perform cell switching based on the selected neighboring cell.
After the terminal device performs cell measurement, the measurement result may be directly sent to the network device, or the measurement result may be sent to the network device after a certain reporting condition is met (for example, a measured qos reference value of an adjacent cell is higher than a set value), and the network device determines whether to perform cell handover, and if cell handover is required, the network device selects an adjacent cell for the terminal device.
In fact, after the terminal device performs cell measurement, it may find that the measured service quality reference value of the neighboring cell is not higher than the currently camped service quality reference value, but based on the existing method, as long as the service quality reference value of the currently camped service cell is lower than the first threshold value, the terminal device may still request the network device to measure the time slot and the neighboring cell, and then perform cell measurement. In this case, the terminal device does not actually need to perform cell handover, cell measurement, or request measurement time slots and neighboring cells from the network device, and unnecessary cell measurement undoubtedly increases the power consumption of the terminal device and occupies resources of the terminal device, and the terminal device cannot provide better user experience for users during cell measurement.
In order to avoid resource waste of a terminal device caused by cell measurement when the terminal device does not need to perform cell handover, an embodiment of the present application provides a cell camping method, where the method includes:
step 201: the terminal device determines that a service quality reference value of a currently camped serving cell is smaller than a first threshold value, where the first threshold value may be notified to the terminal device by a network device or locally configured by the terminal device, and the first threshold value may be-90 decibel milliwatt (dbm) or-105 dbm.
Step 202: the terminal device sends the first measurement report or determines not to send the second measurement report.
It should be noted that, in the embodiment of the present application, taking that the threshold values in the a1 event and the a2 event are both the first threshold values as an example, in a possible implementation, the threshold values in the a1 event and the a2 event may also be different, for example, the threshold value in the a1 event is a threshold value 1 (for example, may be-90 dbm), and the threshold value in the a2 event is a threshold value 2 (for example, may be-105 dbm); if the qos reference value of the serving cell is greater than or equal to the threshold value 1, reporting an a1 event, and if the qos reference value of the serving cell is less than the threshold value 2, reporting an a2 event, where the conditions of different threshold values are similar to the conditions of the same threshold value, in the information sending method provided in this embodiment of the present application, only the first threshold value needs to be adjusted to the threshold value in the corresponding event (an a1 event or an a2 event), which is not described herein again.
The terminal device may periodically measure a service quality reference value of the serving cell, and compare the measured service quality reference value with the first threshold value; the terminal device may also measure the qos reference value of the serving cell in a specific time period, for example, the terminal device may select a time period with less information interaction to measure the qos reference value of the serving cell, such as a certain time period in the morning and at midnight.
The qos reference value of the serving cell is a parameter of the serving cell, and the embodiment of the present application does not limit a specific representation form of the qos reference value of the serving cell, and all parameters that can reflect the qos of the serving cell may be used as the qos reference value of the serving cell, for example, the qos reference value of the serving cell may be part or all of the following parameters: signal quality, packet loss rate, Reference Signal Receiving Power (RSRP), Reference Signal Receiving Quality (RSRQ), signal delay, signal jitter, and signal error rate of the serving cell; the reference value of the service quality of the serving cell may also be a value obtained by performing specific operations on the parameters, for example, the reference value of the service quality of the serving cell may be an R value, the R value is a sum of an RSRP of the serving cell and a first set value, and the first set value may be a Q valuehystIs a fixed value; also for example, the service quality reference value of the serving cell may be an S value, S value beingThe difference between the RSRP of the serving cell and a second set value, where the first set value may be Qrelevmin+Qrelevminoffset+Pcompensation，QrelevminMinimum received strength, Q, for RSRP of the serving cellrelevminoffsetTo estimate an offset, PcompensationThe maximum difference between the maximum uplink transmission power allowed by the terminal device in the serving cell and the maximum uplink transmission power of the terminal device itself is obtained.
If the qos reference value of the serving cell is smaller than the first threshold, it indicates that the qos of the serving cell is poor, but the terminal device has already measured the serving cell (corresponding to cell 1 in fig. 1) and the neighboring cells (corresponding to cells 2 and 3 in fig. 1) when newly selecting the serving cell, and has selected cell 1 with the highest qos reference value as the serving cell, and if the qos reference value of the serving cell is smaller than the first threshold, it indicates that the neighboring cell is not larger than the first threshold, in this case, the terminal device does not need to perform cell handover, and the terminal device may directly send the first measurement report, that is, an a1 event, and notify the network device that the qos reference value of the serving cell is larger than the first threshold, the network equipment is prevented from continuously allocating adjacent cells and measurement time slots to the terminal equipment, and the terminal equipment can also stop cell measurement; the terminal device may not trigger the second measurement report, that is, does not report the a2 event, so that the network device does not need to continuously allocate the neighboring cell and the measurement timeslot to the terminal device.
As the position of the terminal device in the serving cell is not always constant but may move, the position of the terminal device in the serving cell is different, if the terminal device performs cell measurement, the service quality reference values of the neighboring cells measured by the terminal device may also be different, and the service quality reference values of the serving cell where the terminal device currently resides and the neighboring cells may be different from the service quality reference values measured when the serving cell was initially selected before, as shown in fig. 3, the serving cell where the terminal device currently resides is a cell 1 where the network device 1 resides, and the neighboring cells allocated to the terminal device by the network device 1 are respectively a cell 2 where the network device 2 resides and a cell 3 where the network device 3 resides; for the cell 2, when the terminal device moves from the position a to the position B, the terminal device moves from the edge area of the cell 2 to the center area of the cell 2, and the service quality reference value of the cell 2 detected by the terminal device at the position a is lower than the service quality reference value of the cell 2 detected at the position B; for the cell 3, when the terminal device moves from the position a to the position B, the terminal device is always located in the central area of the cell 3, the service quality reference value of the cell 3 detected by the terminal device at the position a is less different from the service quality reference value of the cell 3 detected at the position a, and within a certain allowable range, the service quality reference value of the cell 3 detected by the terminal device at the position a can be considered to be substantially the same as the service quality reference value of the cell 3 detected at the position a.
In order to ensure that the serving cell qos reference value at which the terminal device currently resides is optimal, a preset condition may be set, and before the terminal device sends the first measurement report or determines not to send the second measurement report, the terminal device may first determine whether the preset condition is met, and if the preset condition is met, the terminal device sends the first measurement report or determines not to send the second measurement report.
For example, the preset condition may be at least one of the following:
the terminal equipment is located in a first area, the moving distance of the terminal equipment is not more than a first distance, the moving range of the terminal equipment is within a first range, and the interval between the measuring time of the locally stored service quality reference value of the adjacent cell and the current time is not more than a first duration.
The following describes the above four preset conditions:
1. the terminal device is located in a first area.
The first area may be set in the serving cell, the terminal device may have performed cell measurement when the terminal device is in the first area, and select cell 1 as the serving cell, and then the terminal device moves without exceeding the first area, and the service quality reference value of the neighboring cell measured by the terminal device at any position in the first area may be considered to be the same as the service quality reference value of the neighboring cell measured by the terminal device at any position in the first area, or the difference between the service quality reference value of the neighboring cell measured by the terminal device at any position in the first area and the service quality reference value of the neighboring cell measured by the terminal device at any position in the first area may be considered to be within an allowable error range, that is, the service quality reference value of the neighboring cell measured by the terminal device at any position in the first area and the service quality reference value of the neighboring cell measured by the terminal device at any position in the first area may be considered to be substantially the same as the service quality reference value of the neighboring cell measured by the terminal device at any position in the first area The service quality reference values of the adjacent cells measured by any one position are the same.
When the terminal device is in the first area, the serving cell may be considered as the best cell of the service quality reference value.
As another possible implementation manner, the terminal device may also compare the service quality reference value of the serving cell with the service quality reference value of the neighboring cell, and determine that the service quality reference value of the serving cell is not lower than the service quality reference value of the neighboring cell.
The terminal device may locally store a service quality reference value of an adjacent cell measured by a previous cell measurement, for example, the terminal device may store the service quality reference value of the adjacent cell measured by the terminal device each time the adjacent cell is measured, or may delete the previously stored service quality reference value of the adjacent cell after the adjacent cell is measured, and store the service quality reference value of the adjacent cell measured by a current cell measurement, that is, the terminal device may only store the service quality reference value of the adjacent cell measured by the terminal device last time; the above manner of locally storing the service quality reference value of the neighboring cell measured when the cell is measured before by the terminal device is merely an example, and the embodiment of the present application is not limited, and all the service quality reference values of the neighboring cell measured when the cell is measured before being locally stored are applicable to the embodiment of the present application.
After determining that the service quality reference value of the currently residing serving cell is smaller than a first threshold value, the terminal device first determines whether the terminal device has measured the service quality reference value of the neighboring cell before, and whether the terminal device has locally stored the service quality reference value of the neighboring cell measured before; if the serving quality reference value of the neighboring cell measured by the terminal device before is locally stored, the terminal device may compare the serving quality reference value of the neighboring cell with the serving quality reference value of the serving cell, which is locally stored. Because the locally stored service quality reference value of the adjacent cell is used, the process of cell measurement executed by the terminal equipment is omitted, and the processing resource of the terminal can be effectively saved.
The first area may also be an effective area regarded as a service quality reference value of the neighboring cell locally stored by the terminal device.
As shown in fig. 4A, the serving cell where the terminal device is currently located is a cell 1 where the network device 1 is located, the neighboring cells allocated by the network device 1 to the terminal device are respectively cells 2 where the network device 2 is located, an overlapping area of the cells 1, 2, and 3 may be set as the first area, and if the terminal device is located in the first area, it may be considered that the service quality reference value of the neighboring cell 2, which is measured or locally stored at any position of the terminal device in the first area, is the same as the service quality reference value of the neighboring cell 2, which is temporarily measured at any position of the terminal device.
As shown in fig. 4B, the serving cell where the terminal device is currently located is the cell 1 where the network device 1 is located, and the neighboring cells allocated by the network device 1 for the terminal device are the cells 2 where the network device 2 is located respectively.
The terminal device is currently located in a house, the house includes a bedroom a, a bedroom B, a living room C, a bathroom D and a kitchen E, the bedroom a, the bedroom B and the bathroom D can be set as the first area, and if the terminal device is located in the first area, the service quality reference value of the neighboring cell 2, which is measured or locally stored by the terminal device, can be considered to be the same as the service quality reference value of the neighboring cell 2, which is temporarily measured by the terminal device at the current position; if the terminal device is located in the living room C or the kitchen E, since the area where the living room C is located already exceeds the range of the cell 1, the service quality reference value of the neighboring cell 2 locally stored by the terminal device may be different from the service quality reference value of the neighboring cell 2 measured by the terminal device in the living room C.
The first area may be determined according to a serving cell where the terminal device is located and a relative position between neighboring cells, and the first area may be pre-configured by the network device and notified to the terminal device, or may be configured by other devices in the terminal device.
The first area may be characterized by latitude and longitude, time zone, city, street, shop, or some or all of the areas in a building, for example.
The terminal device may determine whether the terminal device is located in the first area according to current location information, where the current location information of the terminal device may be determined by a General Packet Radio Service (GPRS) server, may also be determined by a bluetooth location method, a wireless-fidelity (wifi) location method, or may also be determined by a mobile barometer and a gyroscope location method. All the ways of determining the current position information of the terminal device are applicable to the embodiment of the application.
If the terminal device has exceeded the first area, the terminal device may report an a2 event to the network device in an existing manner, and perform cell measurement.
2. The moving distance of the terminal equipment is not more than the first distance.
If the terminal device has performed cell measurement before or during moving, and selects the cell 1 as a serving cell, and then the moving distance of the terminal device is small and is not greater than the first distance, the service quality reference value of the neighboring cell measured by the terminal device before or during moving and the service quality reference value of the neighboring cell measured by the terminal device during subsequent moving may be considered to be consistent within a certain allowable error range, and thus the serving cell may be determined to be the best cell of the service quality reference value.
Similarly to the condition 1, the terminal device may also compare the service quality reference value of the serving cell with the service quality reference value of the neighboring cell, for example, determine that the service quality reference value of the serving cell is not lower than the service quality reference value of the neighboring cell by using the service quality reference value of the neighboring cell stored locally. The specific process is similar to that in condition 1, and is not described herein again.
As shown in fig. 4C, the serving cell where the terminal device is currently located is a cell 1 where the network device 1 is located, the location of the serving cell is at point a, the neighboring cell allocated by the network device 1 to the terminal device is a cell 2 where the network device 2 is located, and the terminal device may move from point a to point B in the cell 1, and may also move from point a in the cell 1 to point C.
If the first distance is 6 meters, since the linear distance of the terminal device moving from the point a to the point B in the cell 1 is less than the first distance, it may be considered that the difference between the service quality reference value of the neighboring cell measured at the point a or locally stored by the terminal device and the service quality reference value of the neighboring cell measured at any point on the straight line from the point a to the point B by the terminal device is within an allowable error range, and the difference is substantially considered to be consistent. The straight-line distance from the point a to the point C in the cell 1 by the terminal device is greater than the first distance, and it may be considered that the difference between the service quality reference value of the neighboring cell measured by the terminal device at the point a and the service quality reference value of the neighboring cell measured by the terminal device at the point C is large and cannot be equal.
In fig. 4C, the first distance is taken as a straight line distance, the first distance may also be a moving distance of the terminal device, and any manner that can indicate a distance is applicable to the embodiment of the present application, which is not limited in the embodiment of the present application.
The size of the first distance can be determined according to the position of the terminal equipment, the serving cell where the terminal equipment is located and the relative position between adjacent cells, the first distance corresponding to the different positions of the terminal equipment can be different, for example, the position of the terminal equipment is located in the central area of the serving cell where the terminal equipment is located, the corresponding first distance can be set to be a large value, the position of the terminal equipment is located in the edge area of the serving cell where the terminal equipment is located, and the corresponding first distance can be set to be a small value.
As shown in fig. 4D, the serving cell where the terminal device is currently located is the cell 1 where the network device 1 is located, the neighboring cell allocated by the network device to the terminal device is the cell 2 where the network device 2 is located, the location of the terminal device may be point a, which is located in the central area of cell 1, the moving distance of the terminal device is large and will not have a large influence on the service quality reference value of the neighboring cell 2 measured by the terminal device, so that the first distance corresponding to the point a of the terminal device can be set to 10 meters, the point B is located in the edge area of the cell 1, when the moving distance of the terminal device is large, the terminal device may move out of the cell 1, the service quality reference value of the neighboring cell measured by the terminal device is greatly affected, so that the first distance corresponding to the point B of the terminal device may be set to be 5 meters.
The first distance may be pre-configured by the network device and notified to the terminal device, or may be configured by another device in the terminal device.
3. The moving range of the terminal equipment is within a first range.
When the terminal device moves within a small moving range and does not exceed the first range, the terminal device performs cell measurement at an original position, selects a cell 1 as a serving cell, and then moves within the first range, and it may be considered that a difference between a serving quality reference value of a neighboring cell measured by the terminal device at the original position and a serving quality reference value of the neighboring cell measured by the terminal device during the movement of the terminal device within the first range is within a certain allowable error range and may be considered as being consistent, and it may be determined that the serving cell is the best serving quality reference value.
Similarly to the condition 1, the terminal device may also compare the service quality reference value of the serving cell with the service quality reference value of the neighboring cell, for example, determine that the service quality reference value of the serving cell is not lower than the service quality reference value of the neighboring cell by using the service quality reference value of the neighboring cell stored locally. The specific process is similar to that in condition 1, and is not described herein again.
Unlike the first area in condition 1, the first area is a fixed area defined in the serving cell, and the first range in condition 3 is related to the moving position of the terminal device, and may be an area range defined by using a certain position of the terminal device as a starting point, that is, the first range may be flexibly changed, for example, the first range is set to a circle centered on a measurement point of a service quality reference value of a neighboring cell locally stored by the terminal device, or a regular or irregular area range centered on a measurement point of a service quality reference value of a neighboring cell locally stored by the terminal device.
As shown in fig. 4E, the serving cell where the terminal device is currently located is the cell 1 where the network device 1 is located, the location is at point a, the neighboring cell allocated by the network device to the terminal device is the cell 2 where the network device 2 is located, if the terminal device moves in a circle with point a as a center and a radius of 6 meters, and the first range may be set to a circle with point a as a center and a radius of 7 meters, obviously, the moving range of the terminal device is within the first range, it may be considered that the difference between the service quality reference value of the neighboring cell 2, which is measured or locally stored by the terminal device within the moving range, and the service quality reference value of the neighboring cell 2, which is measured by the terminal device at any point within the moving range, is within an allowable error range, and is basically considered to be consistent. If the terminal device moves in a circle with a center at point a and a radius of 10 meters, and the first range may be set as a circle with a center at point a and a radius of 7 meters, obviously, a part of the movement range of the terminal device already exceeds the first range, and it can be considered that the difference between the measured or locally stored service quality reference value of the neighboring cell and the service quality reference value of the neighboring cell temporarily measured by the terminal device is within an allowable error range and is basically considered as consistent when the movement range of the terminal device does not exceed the first range; when the moving range of the terminal device exceeds the first range, the difference between the measured or locally stored service quality reference value of the neighboring cell and the service quality reference value of the neighboring cell temporarily measured by the terminal device is large, and the difference cannot be directly equal.
In fig. 4E, the shape of the first range is a circle, but the first range may have other shapes, and the embodiment of the present application is not limited thereto, and any manner that can indicate the range is applicable to the embodiment of the present application.
The shape or size of the first range may be determined according to the position of the terminal device, the serving cell in which the terminal device is located, and the relative position between adjacent cells, where the first range corresponding to the different positions of the terminal device is different, for example, the first range corresponding to the position of the terminal device located in the center area of the serving cell in which the terminal device is located may be set as a larger range, and the first range corresponding to the position of the terminal device located in the edge area of the serving cell in which the terminal device is located may be set as a smaller range.
As shown in fig. 4F, the serving cell where the terminal device is currently located is the cell 1 where the network device 1 is located, the neighboring cell allocated by the network device for the terminal device is the cell 2 where the network device 2 is located, the location where the terminal device is located may be the point a and move within the range around the point a, and the terminal device may also be the point B and move within the range around the point B; the point a is located in a central area of the cell 1, and the moving range of the terminal device is large and does not have a large influence on the service quality reference value of the neighboring cell measured by the terminal device, so that the first range corresponding to the point a of the terminal device may be a circle with the point a as a center and the radius of 10 meters, and the point B is located in an edge area of the cell 1, and when the moving range of the terminal device is large, the terminal device may move out of the cell 1 to have a large influence on the service quality reference value of the neighboring cell measured by the terminal device, so that the first range corresponding to the point B of the terminal device may be a semicircle with the point B as a center and the radius of 5 meters.
The first range may be pre-configured by the network device and notified to the terminal device, or may be configured by another device in the terminal device.
The detection modes of the movement state (such as the movement distance, the movement range, and the like) of the terminal device may be many, for example, may be determined by the GPRS server, may also be determined by a sensor arranged on the terminal device, and may also be determined by doppler frequency offset estimation, and all the modes that can detect the movement distance of the terminal device are applicable to the embodiment of the present application.
The following describes the determination of the moving state of the terminal device by a sensor provided on the terminal device, or by doppler frequency offset estimation:
as shown in fig. 5A, a schematic diagram of a structure of the terminal device includes a sensor, a sensor determination module and a processing module,
the sensor may be an Accelerometer (Accelerometer) or a barometer, and the mobile state of the terminal device may be detected through an algorithm, such as big data analysis, for example, such as stationary, relatively stationary, walking, riding, or vehicle-mounted. For example, the sensor determining module determines that the terminal is in a stationary state or a relatively stationary state (for example, the relatively stationary state is that the moving distance of the terminal device is small and is smaller than the first distance, or the moving range of the terminal device is small and is smaller than the first range, etc.), and then, the processing module may perform corresponding operations, such as sending the first measurement report, or determining that the second measurement report does not occur, etc.
The manner of doppler estimation is explained below:
in the doppler frequency offset estimation method, the doppler frequency offset estimation is performed by using the correlation of reference signals (different subframes carrying the reference signals) of a cell, and the moving speed of the terminal device is determined by the frequency offset of the reference signals.
The Doppler frequency offset estimation principle is that a Bessel function is satisfied through an autocorrelation function, and R (tau) is J0(2πfDτ)+σ2δ(t-τ)，
Figure BDA0003547712120000111
Wherein R (tau) is an autocorrelation function and represents autocorrelation values between different subframes, J0(2πfDτ) is a Bessel function, σ2Delta (t-tau) is used to characterize the noise power value between different sub-frames, which reflects the strength of the signal-to-noise ratio, fDFor doppler frequency offset, τ is the spacing between different subframes.
As shown in fig. 5B, a schematic diagram of autocorrelation values between different subframes, where different curves correspond to different doppler frequency offsets, it can be seen that the larger τ is, the more obvious the difference between autocorrelation values under different doppler frequency offsets is, which can indicate that the larger τ is, the higher the accuracy of doppler frequency offset estimation is; in practice, the accuracy of the doppler frequency offset estimation should be improved as much as possible.
In practical application, whether the terminal device moves or not is judged, and the terminal device can be determined by a sensor or Doppler frequency offset estimation alone or by combining the two modes.
As shown in fig. 5C, taking the interval τ between sub-frames as 1ms as an example, the relationship between the gear of the doppler frequency offset estimation and the corresponding frequency offset, and the mean value of the doppler values corresponding to two consecutive gears is a gear boundary; for example, the intermediate value between 5Hz and 30Hz, 17.5Hz (the accuracy can be determined as 0.5), is the boundary between the gears 0 and 1, the Doppler value less than 17.5Hz is classified as 0, and the Doppler value greater than 17.5Hz and less than 45Hz is classified as 1.
All three conditions relate to the moving condition of the terminal equipment, and the conditions, such as condition 4, can also be set from the moving time of the terminal equipment.
4. And the interval between the measurement time of the locally stored service quality reference value of the adjacent cell and the current time is not more than a first time length.
The moving time of the terminal device is short, the corresponding moving distance and moving range are usually small, and the difference between the service quality reference value of the neighboring cell measured at the original position or locally stored by the terminal device and the service quality reference value of the neighboring cell measured by the terminal device in the first time period moving process can be basically considered as consistent within a certain allowable error range.
The size of the first duration may be determined according to a position of the terminal device, a serving cell in which the terminal device is located, and a relative position between adjacent cells, where the first duration corresponding to the different positions of the terminal device is different, for example, the position of the terminal device is located in a central area of the serving cell in which the terminal device is located, the terminal device may move within a longer time, and a relatively larger moving distance and moving range of the terminal device do not cause a larger influence on a service quality reference value of the adjacent cell measured by the terminal device, and then the corresponding first duration may be set to a larger value; if the position of the terminal device is located in the edge area of the serving cell where the terminal device is located, the relatively large moving distance and moving range of the terminal device may cause the terminal device to move out of the serving cell of the terminal device, which may cause a large influence on the service quality reference value of the neighboring cell measured by the terminal device, so that the corresponding first duration may be set to a small value, and the moving distance or moving range of the terminal device is also small within the small first duration.
As shown in fig. 4D, the serving cell where the terminal device is currently located is the cell 1 where the network device 1 is located, the neighboring cell allocated by the network device to the terminal device is the cell 2 where the network device 2 is located, the location of the terminal device may be point a, which is located in the central area of cell 1, or point B, the moving time of the terminal device is longer and will not have a larger influence on the service quality reference value of the neighboring cell measured by the terminal device, so the first time length corresponding to the point a of the terminal device can be set to 10 minutes, the point B is located in the edge area of the cell 1, when the moving time of the terminal device is longer, the terminal device may move out of the cell 1, the service quality reference value of the neighboring cell measured by the terminal device is greatly affected, so that the first time length corresponding to the point B by the terminal device can be set to 5 minutes.
It should be noted that, in the embodiment of the present application, the specific form of the preset condition is not limited, and any condition that can represent the service quality reference value of the neighboring cell, where the moving range of the terminal device does not affect the measurement, is applicable to the embodiment of the present application.
In the description of the above four conditions, the manner in which the terminal device acquires the neighboring cell is not limited, and for example, the terminal device may acquire information of the neighboring cell from the network device, for example, the second measurement report may be sent, or a locally stored reference value of the measured quality of service of the neighboring cell may also be queried; it should be noted that, in the embodiment of the present application, the number of neighboring cells is not limited, and the network device may allocate one or more neighboring cells to the terminal device based on the location of the terminal device.
As another possible implementation manner, after the terminal device obtains the information of the neighboring cell from the network device, it may also be possible to directly measure the service quality reference value of the neighboring cell without determining whether the service quality reference value of the neighboring cell measured before by the terminal device is stored locally, where a manner in which the terminal device measures the service quality reference value of the neighboring cell may refer to a manner in which the terminal device measures the service quality reference value of the serving cell, and details thereof are not repeated herein; after the measurement, the terminal device may determine a size relationship between a service quality reference value of a current neighboring cell and a service quality reference value of the serving cell, and further determine that the serving cell is a better cell of the service quality reference value than the neighboring cell.
The service quality reference value of the neighboring cell is not greater than the service quality reference value of the serving cell, which indicates that the service quality reference value of the serving cell is the cell with the better current service quality reference value, and the terminal device may still reside in the serving cell and does not need to be handed over from the serving cell to another cell.
The terminal device may adopt the following several ways to avoid the network device from continuously allocating the neighboring cell and the measurement timeslot to the terminal device:
in a first manner, the terminal device sends a first measurement report to the network device, where the first measurement report is used to notify that a service quality reference value of a serving cell of the network device is greater than a first threshold value.
Since the service quality reference value of the serving cell actually measured by the terminal device is not greater than the first threshold, the terminal device may modify the service quality reference value of the serving cell in the first measurement report, where the modified service quality reference value of the serving cell should be greater than the first threshold.
Since the network device may not detect whether the serving quality reference value of the serving cell in the first measurement report is greater than the first threshold value when receiving the first measurement report, but determine that the received measurement report is the first measurement report only by the message type of the first measurement report or the flag bit in the first measurement report, so as to notify the network device that the serving quality reference value of the serving cell is greater than the first threshold value. The terminal device may not modify the serving cell quality of service reference value in the first measurement report.
In a second manner, the terminal device may not send a second measurement report to the network device, where the second measurement report is used to notify that the service quality reference value of the serving cell of the network device is smaller than the first threshold value. The network device may not receive the second measurement report, and may default that the current terminal device is in a serving cell with a better qos reference value.
For example, the terminal device may modify the service quality reference value of the serving cell after measuring the service quality reference value of the serving cell, so that the modified service quality reference value of the serving cell is not less than the first threshold, and thus it may be determined that the second measurement report does not need to be sent; the terminal device may also directly suppress sending of the second measurement report without modifying the qos reference value of the serving cell, and does not report the a2 event.
As shown in fig. 6, when the network device needs to configure a cell measurement allocation measurement time slot (gap) of the inter-frequency system, the terminal device may determine whether a condition for suppressing allocation of the gap is satisfied (i.e., a preset condition in the embodiment of the present application), and whether the terminal device has a small moving distance or moving range and can be considered to reside in a better cell; when a preset condition is met, a mode of suppressing allocation of gap or cell measurement is started, specifically, reporting of an a1 event may be triggered, and an a2 event may also be suppressed.
Aiming at the event triggering report A1, the first mode is that the first measurement report can be sent, and the service quality reference value of the service cell carried in the first measurement report is not modified; the second method is to directly modify the qos reference value of the serving cell so as to satisfy the condition of reporting the a1 event, so that the qos reference value of the serving cell is greater than the first threshold, and then send the first measurement report.
For the event inhibiting reporting a2, the first mode is not to send the second measurement report; the second way is that the qos reference value of the serving cell may be directly modified so as to satisfy the condition that the event a2 is not reported, so that the qos reference value of the serving cell is smaller than the first threshold, and the second measurement report is not sent.
The terminal device may periodically determine whether the allocation-inhibited gap condition is satisfied.
For example, some terminal devices have dual frequency point receiving capability, that is, cell measurement of a cell with the same system and different frequencies is performed, and the network device is not required to allocate a measurement time slot, and in the case of no measurement time slot, the terminal device may also perform the measurement of the inter-frequency cell of the same system, in this case, if the terminal device reports the a2 event, the terminal device does not need to measure the time slot when performing cell measurement on part of the same-system pilot frequency cells (for convenience of explanation, the terminal device can perform cell measurement on the same-system pilot frequency cells without measuring the time slot and is called as a first same-system pilot frequency cell, and the terminal device can perform cell measurement on the same-system pilot frequency cells without measuring the time slot and is called as a second same-system pilot frequency cell).
In this case, a terminal device with dual frequency point receiving capability may also report an a2 event, the network device may allocate a neighboring cell, and if the neighboring cell allocated by the network device includes a first system-shared pilot frequency cell, the terminal device may perform cell measurement on the first system-shared pilot frequency cell; for a cell (e.g., the inter-system pilot frequency cell) that needs to measure a timeslot to perform cell measurement only when the inter-system pilot frequency cell is not the first inter-system pilot frequency cell, the terminal device may report an a1 event after reporting the a2 event, so as to avoid the network device from allocating a measurement timeslot.
In addition to the above two modes, the following modes three and four can be adopted:
the third method is that the terminal device may send a first message to the network device, where the first message is used to indicate that the terminal device meets the preset condition.
In this way, the terminal device may send the second measurement report to the network device, and after receiving the first message and the second measurement report, the network device may determine that the terminal device satisfies the preset condition, that is, that no movement with a large range or a large distance (such as exceeding the first range or exceeding the first example) occurs, and the network device may consider that the terminal device currently resides in a better cell, and does not need to perform cell handover, and may not allocate a neighboring cell and the measurement time slot to the terminal device.
As a possible implementation manner, the network device may be configured with an allocation policy, where the allocation policy indicates whether to allocate a neighbor cell and the measurement timeslot for the terminal device when the terminal device meets a preset condition.
The network device may determine whether it is necessary to allocate a neighbor cell and the measurement time slot to the terminal device according to the allocation policy based on the first message.
For example, the first message may carry location information of the terminal device, the allocation policy may indicate that the terminal device meets a preset condition, and the distance from the terminal device to the edge area of the serving cell is greater than a first threshold, and it is not necessary to allocate a neighboring cell and the measurement timeslot to the terminal device, and the network device may determine, according to the location information of the terminal device, whether the distance from the terminal device to the edge area of the serving cell is greater than the first threshold; the allocation policy may also indicate that the terminal device meets a preset condition, and the edge area of the terminal device from the serving cell is smaller than a first threshold and larger than a second threshold, without allocating an adjacent cell and the measurement timeslot to the terminal device, the network device may determine, according to the location information of the terminal device, that the edge area of the terminal device from the serving cell is smaller than the first threshold and larger than the second threshold; the above indication manner of the allocation policy is only an example, and the embodiment of the present application does not limit the specific content of the allocation policy, and all allocation policies that can determine not to allocate a neighbor cell and a measurement timeslot to the terminal device based on the first message are applicable to the embodiment of the present application.
In addition to the above three modes, the embodiment of the present application is not limited to other modes, for example, the terminal device may send a second measurement report to the network device, and if the network device allocates the neighboring cell and the measurement time slot to the terminal device, the terminal device obtains the neighboring cell and the measurement time slot from the network device, may not perform cell measurement, and may further reduce power consumption of the terminal device.
In a manner that the network device sends the first measurement report, a second threshold may be set, for example, an S-Measure value (S-Measure), where the second threshold may be configured by the network device or the terminal device; the second threshold is greater than the first threshold.
The first threshold value and the second threshold value have the following differences:
the second threshold is a threshold for the terminal device to determine whether to start cell measurement of a common frequency, a pilot frequency, or a different system cell, and the first threshold is a threshold for the terminal device to determine whether to start cell measurement of a different frequency or a different system cell.
That is to say, if the qos reference value of the serving cell is greater than the second threshold, the terminal device may send a third measurement report to notify that the qos reference value of the serving cell is greater than the second threshold, and the network device may stop allocating information (such as a measurement time slot) required for measurement of any neighboring cell, where the information also includes information required for measurement of the intra-frequency cell. And if the service quality reference value of the service cell is smaller than the second threshold value and larger than the first threshold value, sending a first measurement report to trigger the terminal equipment to start the cell measurement of the different frequency or different system cells.
If the qos reference value of the serving cell is smaller than the second threshold, in order to reduce power consumption caused by cell measurement, the terminal device may send a third measurement report, and the network device may consider that the terminal device is camped on a better cell without allocating a measurement timeslot.
In the above-mentioned embodiment, the terminal device needs to determine the service quality reference value of the serving cell and the service quality reference value of the neighboring cell, as a possible implementation manner, the terminal device may not determine the service quality reference value of the serving cell and the service quality reference value of the neighbor cell, but rather determines whether the serving cell can satisfy the service requirement of the terminal device, for example, the terminal device may detect whether there is an interruption in the service of the terminal device, or detecting whether the communication of the terminal device is normal, the above-mentioned manner of determining whether the serving cell can meet the service requirement of the terminal device is only an example, and all the manners of determining that the serving cell can meet the service requirement of the terminal device by detecting the service state of the terminal device are applicable to the embodiments of the present application.
When the terminal device determines that the serving cell can meet the service requirement of the terminal device, the terminal device may not request the network device for the neighboring cell and the measurement timeslot, for example, may send the first measurement report or not trigger the second measurement report, or may not perform cell measurement.
Based on the same concept, fig. 7 illustrates a terminal device 700 provided in the present application. The electronic device 700 comprises at least one processor 710, at least one memory 720. The processor 710 is coupled with the memory 720, and the coupling in this embodiment is an indirect coupling or a communication connection between devices, units or modules, which may be electrical, mechanical or other forms for information interaction between the devices, units or modules.
The processor 710 may have a data transceiving function, and may be capable of communicating with other devices, and in the apparatus shown in fig. 7, a separate data transceiving module, such as the transceiver 730, may be provided for transceiving data; the processor 710 may perform data transmission via the transceiver 730 when communicating with other devices, e.g., the transceiver 730 may be configured to send the first measurement report, the first message, etc.
The memory 720 stores data associated with the code instructions. The processor 710 is configured to call the code instructions and other related data stored in the memory 720 to perform the cell camping method according to the embodiment of the present application. For example, selecting a cell with the highest reference value of service quality from the cells searched by the terminal device as a first cell currently camped on; and when the service quality reference value of the first cell is smaller than a first threshold value, reporting an A1 event or determining not to report an A2 event and the like.
It should be understood that the terminal device 700 may be configured to implement the cell camping method according to the embodiment of the present application, and reference may be made to the method portion for relevant features, which is not described herein again.
Illustratively, as shown in fig. 8, the present application provides a chip 800. Chip 800 includes at least one processor 810, an interface 820. The interface 820 is configured to receive a code instruction and send the received code instruction to the processor 810, and the processor 810 executes the received code instruction sent by the interface to execute the cell camping method according to the embodiment of the present application, where specific cell camping manners may refer to embodiments of the method, and are not described herein again.
It is clear to those skilled in the art that the embodiments of the present application can be implemented in hardware, or firmware, or a combination thereof. When implemented in software, the functions described above may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a computer. Taking this as an example but not limiting: the computer-readable medium may include RAM, ROM, an Electrically Erasable Programmable Read Only Memory (EEPROM), a compact disc read-Only memory (CD-ROM) or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. Furthermore. Any connection is properly termed a computer-readable medium. For example, if software is transmitted from a website, a server, or other remote source using a coaxial cable, a fiber optic cable, a twisted pair, a Digital Subscriber Line (DSL), or wireless technologies such as infrared, radio, and microwave, the coaxial cable, the fiber optic cable, the twisted pair, the DSL, or the wireless technologies such as infrared, radio, and microwave are included in the fixation of the medium. Disk and disc, as used in accordance with embodiments of the present application, includes Compact Disc (CD), laser disc, optical disc, Digital Versatile Disc (DVD), floppy disk and blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.
In short, the above description is only an example of the present application, and is not intended to limit the scope of the present application. Any modifications, equivalents, improvements and the like made in accordance with the disclosure of the present application are intended to be included within the scope of the present application.

Claims (16)

1. A terminal device, characterized in that the terminal device comprises a processor and a memory;
the memory stores code instructions;
the processor is used for calling the code instructions stored by the memory and executing:
selecting a cell with the highest service quality reference value from the searched cells as a first cell which is resided at present;
when the service quality reference value of the first cell is smaller than a first threshold value, sending a first measurement report to a network device or determining not to send a second measurement report to the network device, where the first measurement report is used to notify the network device that the service quality reference value of the first cell is larger than the first threshold value, and the second measurement report is used to notify the network device that the service quality reference value of the first cell is smaller than the first threshold value.
2. The terminal device of claim 1, wherein the first threshold is-90 db-mw or-105 db-mw.
3. The terminal device of claim 1, wherein the code instructions further comprise:
determining that a preset condition is met before sending a first measurement report to the network device or determining not to send a second measurement report to the network device, where the preset condition is used to indicate that the first cell of the terminal device is a cell with a highest service quality reference value in cells searched by the terminal device.
4. The terminal device according to claim 3, wherein the preset condition is at least one of:
the terminal device is located in a first area, the moving distance of the terminal device is not larger than the first distance, the moving range of the terminal device is within the first range, and the interval between the measuring time of the service quality reference value of the adjacent cell stored locally and the current time is not larger than the first duration.
5. The terminal device of any of claims 1-3, wherein the code instructions further comprise:
stopping cell measurements after determining that the quality of service reference value of the first cell is less than a first threshold value.
6. The terminal device of claim 1, wherein said sending the first measurement report to the network device comprises:
modifying the service quality reference value of the first cell, wherein the modified service quality reference value of the first cell is larger than the first threshold value;
and sending a first measurement report carrying the modified service quality reference value of the first cell to the network equipment.
7. The terminal device of claim 1 or 3, wherein the code instructions further comprise:
and after determining that the service quality reference value of the first cell is smaller than a first threshold value, sending a first message to network equipment, wherein the first message is used for indicating that the terminal equipment meets a preset condition.
8. The terminal device of claim 7, wherein the first message includes location information of the terminal device.
9. A method of cell camping, comprising:
the terminal equipment selects a cell with the highest reference value of service quality from the cells searched by the terminal equipment as a first cell resided currently;
when the service quality reference value of the first cell is smaller than a first threshold value, the terminal device sends a first measurement report to a network device or determines not to send a second measurement report to the network device, wherein the first measurement report is used for informing the network device that the service quality reference value of the first cell is larger than the first threshold value, and the second measurement report is used for informing the network device that the service quality reference value of the first cell is smaller than the first threshold value.
10. The method of claim 9, wherein prior to the terminal device sending the first measurement report to the network device or determining not to send the second measurement report to the network device, further comprising:
and the terminal equipment determines that a preset condition is met, wherein the preset condition is used for indicating the first cell of the terminal equipment to be a cell with the highest service quality reference value in the cells searched by the terminal equipment.
11. The method of claim 10, wherein the preset condition is at least one of:
the terminal equipment is located in a first area, the moving distance of the terminal equipment is not more than a first distance, the moving range of the terminal equipment is within a first range, and the interval between the measuring time of the locally stored service quality reference value of the adjacent cell and the current time is not more than a first duration.
12. The method of any of claims 9-11, wherein the terminal device, after determining that the quality of service reference value of the first cell is less than the first threshold value, further comprises:
the terminal equipment stops cell measurement.
13. The method of claim 9, wherein the terminal device sends a first measurement report to the network device, comprising:
the terminal equipment modifies the service quality reference value of the first cell, and the modified service quality reference value of the first cell is larger than the first threshold value;
and the terminal equipment sends a first measurement report carrying the modified service quality reference value of the first cell to the network equipment.
14. The method of claim 9 or 10, wherein the terminal device, after determining that the quality of service reference value of the first cell is less than the first threshold value, further comprises:
the terminal equipment sends a first message to network equipment, wherein the first message is used for indicating that the terminal equipment meets a preset condition.
15. The method of claim 14, wherein the first message comprises location information of the terminal device.
16. A chip, wherein the chip comprises a processor and an interface;
the interface is used for receiving code instructions and transmitting the received code instructions to the processor;
the processor is configured to execute the received code instruction sent by the interface, and execute:
selecting a cell with the highest reference value of service quality from the cells searched by the terminal equipment as a first cell resided currently;
when the service quality reference value of the first cell is smaller than a first threshold value, sending a first measurement report to a network device or determining not to send a second measurement report to the network device, where the first measurement report is used to notify the network device that the service quality reference value of the first cell is larger than the first threshold value, and the second measurement report is used to notify the network device that the service quality reference value of the first cell is smaller than the first threshold value.
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